Unkeln.温克尔(在德国；东经 7º14' 北纬 50º35')UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西unfertilized hyaline layer未受精透明带(动)unbalanced load protection不平衡负载保护undirected circulant graph无向循环图unfulfilled administration行政不履行法定职责UN Human Rights Commission镀锡原板unmanned undersea vehicles无人水下航行器Uncontrolled subject words非控主题词uncalled-for rudeness.无缘无故的粗鲁unconstrained optimization无约束最优化unguentum acidi salicylici[医] 水杨酸软膏